Myth you don't know what easter eggs are?
they are little tiny pieces of material (that has nothing to do with the original story) hidden on the DVD as a reward to ppl who check out the entire DVD and pay attention
(LOTR had some, gollum his MTV Speech in TTT, the parody on the council of elrond on FOTR)
they are usualy not easy to find (I normaly stumble upon them by accident) but there are some great webbies about them